Intermediate Java Developer

Purpose: To develop functionality for a JEE (J2EE) based product. The backend is a service oriented Spring based application. It provides a service layer for different user channels ranging from web, rich clients and batch users integrating via JMS and web services. The work contains a portion of support and refactoring of existing code as well as new development (extend it for new functionality) and add extra integration points.

Responsibilities/Tasks:
Support existing and develop new functionality and components.
Understand existing product and domain elements and work with business analysts to refine and implement new requirements.
Refactor and improve the code to keep the product maintainable and adaptable to new requirements.
Work effectively in a team environment and follow/develop product software development processes and standards.
Evaluate and improve application performance, and high availability features.
Create unit and integrated system tests to show that the developed functionality works as intended.
Create technical documentation that explains how the various components of the system work and how to use them.
Do root cause analysis on bugs to find and fix the cause of a problem in an integrated system.
Build and deploy the system on an application server.
Create and execute functional test scenarios (dev testing).
Incorporate the work done by other developers and do whatever is necessary to get the system to work
again with the changes, including debugging other people’s code, making changes to test data, etc.

Requirements:
A strong knowledge of Java is essential.
2-3 years relevant experience as an intermediary back-end developer as part of a team in a software development environment.
Experience in scripting languages is preferred (e.g. JavaScript, Angular, Python/Jython).
Ability to work in a team environment: Follow mentorship/provide team leader mentorship, collaborate on a common (UML) design model.
A good understanding of the SDLC process, tools and techniques specifically as applied to software development methodology.

Skills and Knowledge Requirements:
Experience with team development tools: Use of source control applications (preferably GIT); Use of a UML tool for documentation
Experience of the following technologies:
o JEE (J2EE) server side technologies
o Spring framework (preferable)
o JPA /Hibernate
o Experience with an application server (IBM Websphere - preferable)
o Integration experience (Web/RESTful services, JMS)
o JAXB and XML Schema
o Maven
o SQL and experience with a relational database (i.e. Oracle, PostgreSQL, MySQL, DB2)
o SoapUI/Postman

Ability to deliver production quality software by e.g. paying attention to detail, do extensive unit testing and support quality testing phases.

Knowledge and experience of the following would be a plus:
o Business process/workflow layers e.g. JBPM, BPEL (Activiti)
o Rules engines (e.g. Drools)
o Design patterns (Object Oriented, SOLID, GRASP)
o Continuous integration (i.e. Jenkins, Bamboo, Docker)